#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>

#define PRAISE "0123456789"
#define PI 3.1415926
#define SPACE ' '
const float f_pi = 3.1415926F;

void printStr(void);

void printPi(void);

void get_put_char(void);

int main(void)
{
    get_put_char();

    return 0;
}

void printStr(void)
{
    char name[40];

    printf("name: ");
    fflush(stdout);
    scanf("%s", name);
    printf("sizeof: [%zd], strlen: [%zd]\n", sizeof(name), strlen(name));
    printf("sizeof: [%zd], strlen: [%zd]\n", sizeof(PRAISE), strlen(PRAISE));
}

void printPi(void)
{
    float radius, area;

    scanf("%f", &radius);
    area = PI * f_pi * radius;

    printf("area: [%.2f], radius: [%.2f]\n", area, radius);
}

void get_put_char(void)
{
    int ch;

    while ((ch = getchar()) != '\n')
    {
        // isalpha 来自"ctype.h" 是否是字母
        if (isalpha(ch))
        {
            putchar(ch);
        } else
        {
            putchar(ch + 1);
        }
    }

    putchar(ch);
}
